Roof structure



G. GEYER.

ROOF STRUCTURE. v

APPLICATION FILED MAR. re. 1921.

. 1,417,513. Patented mm, 1922.-

w res STATES PATENT" OFFICE.

GEORGE GEYER, on HAMMOND, Inn-Inna, assreivon To rnnnitan ,cnMENr 111 COMPANY, or cmcaeo; ILLrNoIs a conronArro'n orgrnnmors;

noon s'rnnorunn.

To all whom it may concern:

Be it known that I, Gnonen GEYER, a citizen of the United States, resldmg at Hammond, in the county ofLake and State of Indiana, have invented a new and useful Improvement in Roof Structures, of which the following is a specification. 7

My invention relates, more particularly,

to roof structures formed of slabs of cement or the like material, ordinarily assembled, to form the roof, in overlapped courses or rows, the slabs of adjacent rows bemg arranged in staggered relation, my invention relating more especially to the matter of producing water-tight joints between the slabs. V

My primary object is to provide joints between the slabs which shall be highly effective in excluding the passage of water through them, and which may be provided at much less cost than hitherto possible; and toaccomplish the above'especially where the slabs are provided as relatively thin structures. V

I-Ieretofore it has been common practice to cover the joints between the opposing edges of slabs arranged in edge to edge relation, by what are known as rolls, whlch are structures formed separate from the slabs, and of general semi-circular shape in cross-section, these rolls overlying. the joints between the slabs. While joints thus provided are highly satisfactory in excluding the passage of water through the joints, the cost of constructing a roof in this manner 1s quite expensive, and it is one of my ob ects to provide a joint of such character that such rolls need not be employed.

Referring to the accompanying drawing:

Figure 1 is a plan view of a portion of a roof structure constructed in accordance with my invention, the cement at certain of the joints being broken away. Figure 2 1s a perspective view of one of the similar slabs. Figure 3 is a broken section taken at the lines 8 on Figs. 1 and 5 and viewed in the direction of the arrows. Figure 4c is a broken section taken at-the line 4; on Figs.

1 and 5 and viewed in the direction of the Specificationof Letters Patent." P te y 2! Application filed Mam; 1c, 1921.; 36171317525 j c lar slabs in perspective.v The slabs; rep

resented at 16, are providedof rectangular form, and arepreferably of the thin type with 'reenforcement' (not shown) disposed in the tensile zone of the slab. The slab is provided along'its upper surface adjacent its opposite edges thereof,'with upwardlyextending ribs 7 which extend preferably the full length of the slab and afford atop-r posite edges of the latter, the lengthwiseextending recesses 8. The tile isthickened in a direction lengthwise thereof and along" its medial line toforma roll 9 which ex-- 7 tends from one end of the slab to a point short of the opposite end thereof, the under side of the slab at the end of the latter to which the roll 9 extends, being recessed as represented at'lO. a

In the assembling of theslabs to form a roof structure, they are arranged in ed'ge to edge relation as shown in Figs. 1, 3'. and 4, to form a plurality of courses, withthe upper edges of the slabs of each, except the uppermost, course, overlapped by the lower edges of the courses immediately above them, the slabs of adjacent, courses being arranged inst'aggered relation to cause the joints between the'slabs arranged side by side to extend into therecesses 10 of the slabs of the courses next above'them, as shown. In the arranging of the. slabs in edge to edge relationas stated andshown, the opposing recesses 8 afford at each joint a groove 11 extending lengthwise of the slabs, the adjacent, opposed, edges of the.

tance apart as shown in Figs. 1, 3 and 4. In the laying of the slabs any suitable plastic cementitious material, such as that commonly employed to fill the joints between roof slabs, is applied to the upper surfaces of the slabs to extend, preferably, the full length thereof at the joints, the applied material referred to, and represented at 12,

being provided of such thickness as to ex tend into the channel 11, and at least part way down into the spaces between adjacent slabs, and completely imbed the ribs 7 the body of material 12 preferably being soapplied that it will present the cross-sectional shape as shown in Fig. '4. Beforeapplying the upper courses of slabs, ribbons 13 of the cementitious material referred toare applied across the upper surfaces of the tion thereto, the walls of the shallow recesses 10 will cause these'masses, where engaged by the row of slabs next above them, tobe mashed down, substantially to the cross-sectional shape shown in Fig. 3, thereby causing the cementitious material to completely fill the spacepresented between the slabs at their recessed portions 10 and the ribbed portions of the slabs immediately beneath them. i

It will be noted from the foregoing that the ribs? serve to afford, at the juncture of adjacent slabs, the groove 11 which when filled with the'cementitious material presents a relatively large cross-section of the material, and at their opposite edges serve to dam the water running down the slabs and to a great degree divert it from the joints between the slabs.

Byproviding the channel 11, the cementitious material 12- is interlocked therewith andheld in position relative to the slabs,

in a comparatively large body, thereby,

intending to limit it thereto as the same may be variously modified and altered without departing from the spirit of the invention. 7 a

What I regard as new, and desire to secure by Letters Patent, is:

1. In combination, slabs arranged side by side in edgewise opposed relation, said slabs presenting a groove at their opposed edges, plastic filling material filling said groove and extending above the upper surface of the slab, and a third slab overlapping said first-referred-to slabs, and containing in its under side at one end a relatively shallow recess at which it overlaps one end of the filled groove and in the assembling'of said slabs, directly engage the filling and squeezes the latter into close engagement with the under side of said recess, said filling forming an exposed filler body rendering water-tight the joint between said slabs.

2. In. combination, slabs arranged side by.

side in edgewise opposed relation, said slabs presenting an upwardly openmggroove at their opposed edges, the upper surface of each of said slabs having an upwardly ex "tending rib extending lengthwise. thereof and located betweensaid groove and the main body portion'of the slab, and plastic cementitious filling material filling said grooveand forming an exposed filler rendering water-tight the joint between said slabs. 7

3. In combination, slabs arranged side by side in edgewise opposed relation, said slabs presenting an upwardlyopening groove at their opposed edges, the upper surface of each of said slabs having an upwardly extend- GEORGE GEYER. 

